1 00:00:00,120 --> 00:00:00,960 So sometimes as part of 2 00:00:00,960 --> 00:00:02,100 our system administrator. 3 00:00:02,100 --> 00:00:04,200 You'll need to track devices on the computers 4 00:00:04,200 --> 00:00:05,280 on the network. 5 00:00:05,280 --> 00:00:07,380 And then we're going to maintain a list 6 00:00:07,380 --> 00:00:09,420 of hardware resources that we use 7 00:00:09,420 --> 00:00:10,980 because a lot of times it's going to be important when it comes 8 00:00:10,980 --> 00:00:13,440 to updating systems or keeping track 9 00:00:13,440 --> 00:00:15,720 because sometimes there's different recalls 10 00:00:15,720 --> 00:00:17,130 or different vulnerabilities associated 11 00:00:17,130 --> 00:00:18,150 with different hardware levels. 12 00:00:18,150 --> 00:00:20,070 Now typically it's associated with software levels, 13 00:00:20,070 --> 00:00:23,010 but sometimes it's with hardware or maybe defects. 14 00:00:23,010 --> 00:00:24,480 So we're going to have a list of tools 15 00:00:24,480 --> 00:00:25,830 that we're going to use to actually 16 00:00:25,830 --> 00:00:27,630 identify this information. 17 00:00:27,630 --> 00:00:29,280 So the first thing we want to do is list out 18 00:00:29,280 --> 00:00:30,630 and monitor some things that are 19 00:00:30,630 --> 00:00:33,840 on the PCI bus or just the PCI, 20 00:00:33,840 --> 00:00:36,630 which stands for peripheral component interconnect. 21 00:00:36,630 --> 00:00:38,493 Next, we're going to list PCI items. 22 00:00:41,940 --> 00:00:44,250 Now the way the PCI is set up 23 00:00:44,250 --> 00:00:47,070 is pretty much the first field is the bus, 24 00:00:47,070 --> 00:00:48,660 the second field is the device 25 00:00:48,660 --> 00:00:51,060 and then there's going to be the function. 26 00:00:51,060 --> 00:00:52,410 So you see before the colon, 27 00:00:52,410 --> 00:00:54,900 we're going to go with the slot number. 28 00:00:54,900 --> 00:00:56,400 The second is going to be the class. 29 00:00:56,400 --> 00:00:57,930 So like a host bridge 30 00:00:57,930 --> 00:00:59,700 that's describing what it is. 31 00:00:59,700 --> 00:01:01,440 And then the last set it's going to be the vendor 32 00:01:01,440 --> 00:01:03,510 and the product itself. 33 00:01:03,510 --> 00:01:06,450 So we can see a few of these items here. 34 00:01:06,450 --> 00:01:07,650 Now, if we want to get more in depth, 35 00:01:07,650 --> 00:01:10,680 we're going to do the sudo version of list PCI. 36 00:01:10,680 --> 00:01:12,430 We're going to use the verbose option. 37 00:01:15,270 --> 00:01:18,000 And now it's going to give us more detailed information 38 00:01:18,000 --> 00:01:19,860 about these items. 39 00:01:19,860 --> 00:01:23,040 So we can see input, output, port capabilities, 40 00:01:23,040 --> 00:01:25,680 kernel drivers that each one of these 41 00:01:25,680 --> 00:01:27,543 devices use, et cetera. 42 00:01:28,410 --> 00:01:29,790 Cause we also remember we can use this 43 00:01:29,790 --> 00:01:31,590 for our troubleshooting because 44 00:01:31,590 --> 00:01:33,210 different kernel modules are started 45 00:01:33,210 --> 00:01:35,220 at different sequences and orders. 46 00:01:35,220 --> 00:01:37,710 And now we can associate these kernel modules 47 00:01:37,710 --> 00:01:40,260 with specific functions to help us more 48 00:01:40,260 --> 00:01:43,080 throughout the troubleshooting process if need be. 49 00:01:43,080 --> 00:01:44,400 Now next we're going to do the same thing, 50 00:01:44,400 --> 00:01:45,233 but we're going to do it 51 00:01:45,233 --> 00:01:47,940 with the USB bus, the universal serial bus. 52 00:01:47,940 --> 00:01:50,130 Everyone's very familiar with this bus. 53 00:01:50,130 --> 00:01:52,860 Thumb drives, cameras, pretty much everything uses a 54 00:01:52,860 --> 00:01:55,410 USB attachment at this point. 55 00:01:55,410 --> 00:02:00,410 The first section is going to be the bus number, the device ID 56 00:02:00,660 --> 00:02:04,020 and then the last section's going to be the vendor and product. 57 00:02:04,020 --> 00:02:05,700 Okay. And again, we can do the same thing. 58 00:02:05,700 --> 00:02:10,699 We're going to do sudo, lsusb, going to do verbose. 59 00:02:13,200 --> 00:02:15,210 And again, we can see more information, 60 00:02:15,210 --> 00:02:17,790 more specific information about these items. 61 00:02:17,790 --> 00:02:19,860 And again, if you want to see all of it, 62 00:02:19,860 --> 00:02:22,010 you can just pipe it into the less command. 63 00:02:23,610 --> 00:02:26,400 And again, it gets us more detailed information. 64 00:02:26,400 --> 00:02:31,400 Vendor, product, ID, manufacturer, serial number, 65 00:02:32,100 --> 00:02:35,340 just a lot of different information that can be very useful. 66 00:02:35,340 --> 00:02:38,880 Now, honestly typically, most administrators won't have to 67 00:02:38,880 --> 00:02:42,630 go this far, but it's good to know these tools 68 00:02:42,630 --> 00:02:44,490 in the event that you would need to. 69 00:02:44,490 --> 00:02:46,650 So what we're going to do now is we're going to just 70 00:02:46,650 --> 00:02:49,200 use an example of how to monitor a print job, 71 00:02:49,200 --> 00:02:53,580 but we're going to create a large enough file and print it. 72 00:02:53,580 --> 00:02:56,280 So it gives us time to actually see it in the queue. 73 00:02:56,280 --> 00:02:57,870 We're going to use this command 74 00:02:57,870 --> 00:03:00,633 to encode the data to readable text. 75 00:03:01,470 --> 00:03:03,210 And we're going to create this file to make sure 76 00:03:03,210 --> 00:03:04,043 it's long enough 77 00:03:05,190 --> 00:03:08,133 to actually take a while to print. 78 00:03:09,090 --> 00:03:10,490 So we're going to do the first. 79 00:03:11,340 --> 00:03:13,590 You remember the head command starts from the top 80 00:03:13,590 --> 00:03:16,110 and the count is going to be 81 00:03:16,110 --> 00:03:19,410 the first 10 million lines. 82 00:03:19,410 --> 00:03:21,410 So it's going to make it pretty large file. 83 00:03:25,320 --> 00:03:29,070 Okay. So we sent the output to the print file 84 00:03:29,070 --> 00:03:31,560 and now we're going to actually go ahead and print this. 85 00:03:31,560 --> 00:03:33,033 The print command print file. 86 00:03:34,980 --> 00:03:37,800 And now we're going to actually view the queue, 87 00:03:37,800 --> 00:03:38,883 lpq. 88 00:03:40,290 --> 00:03:41,850 Now again, we can just look at this 89 00:03:41,850 --> 00:03:44,910 and it just shows quickly the status of it. 90 00:03:44,910 --> 00:03:48,930 Who sent the job, what job number it is, 91 00:03:48,930 --> 00:03:53,250 the file or files and the size of the file that's printed. 92 00:03:53,250 --> 00:03:55,380 And again, this is what's meant to be complex. 93 00:03:55,380 --> 00:03:58,950 Linux gives us a lot of tools to help us just go through 94 00:03:58,950 --> 00:04:02,850 and monitor these activities, monitor the devices 95 00:04:02,850 --> 00:04:04,500 and et cetera. 96 00:04:04,500 --> 00:04:06,300 And I'll see you in the next lesson.